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Hi everyone, Thanks for reading my question I have a dead 2017 27’’ Imac that I’m currently trying to diagnose. I may swap the PSU in the hopes that it comes back to life. But I want to take out my SSD(only drive) and read and backup the data What adapter or process do I need to achieve this? Thanks so much! :)

@m056 - If you bought your system with a SSD directly from Apple then you got a PCIe/NVMe blade SSD. Its a big job to get to it to remove it as its on the backside of the logic board iMac Intel 27" Retina 5K Display Blade SSD Replacement which is the same setup as your model. But before we go down that path how about reviewing the onboard diagnostic LED’s to see what’s happening. Carefully remove the display following this guide iMac Intel 27" Retina 5K Display Display Replacement You want to use the tool that comes with the replacement adhesive strips: [linked product missing or disabled: IF174-005-1] and these Plastic Cards (get two sets) otherwise you run the risk of damaging the display. Here’s the location of the LED’s along the bottom edge between the power supply and the logic board.

Tell us what LED’s are telling you.

Hi Michael I am not up to speed on Macs but I would get an external drive caddy (Mac compatible) that has internal connectors for the drive, most likely SATA, and externally a connector (whatever is available and you have on a 2nd Mac, eg USB) to go to another Mac to read the SSD . Connect it up and the 2nd Mac should detect the drive so you can back it up etc. Peter